Hydraulic jack.



G. W. SEASHO LE.

HYDRAULIC JAOK. APPLICATION FILED JULY 5, 1912.

. Patented Mar. 4, 1913.

WITNESSES SEASHOLE.

HYDRAULIC J AGK.

APPLICATION FILED JUL'Y5, 1912.

Patented Mar. 4, 1913.

2 SHEETS-SHEET 2.

IIIIIIIIIIIII [NVENJ'OR WITNESSES .UnrrEn sTATEs PATENT OFFICE.

GUY W. SEASHQLE, (7!v CLIFTON FORGE, VIRGINIA, ASBIGNOR TO J. .G; FRY, O1 CLIFTON FORGE, VIRGINIA.

HYDRAULIC ACK.

Specification of Letters Patent. Application filed July 5, 1918. Serial No. 707,942.

Patented Mar. 4, 1913.

A further object thereof is to produce a movable platform on which is erected an hydraulic or pneumatically operated lifting ack adapted to elevate and transport the ody of a person.

A still further object of my invention is to provide an hydraulic or pneumatic lift- Iing pump upon said platform suitably coupled with an elevating rod adapted to elevate same and hold it at the desired elevation for the 0 eration of the body handling means, more ully described in my pending application for patent, Serial Number 663,241, and a still further object thereof is to provide a more simple, cheap and efficient portable body lifter than has heretofore been produced. I

To these ends, my invention includes the combinations and arrangement of component parts to be hereinafter described, and more particularly pointed out in the claim.

In the accompanying drawings in which like reference characters indicate similar parts, Figure 1 is a perspective view of my at predetermined positions the internally threaded upwardly extending annular flanges or collars 4, 5, and 6, into which are screwed the vertical cylindrical reservoir 7, the elevating cylinder 8 and the pump cylinder 10, respectively, the latter being with the piston and crane'as more particularly described hereinafter.

The elevating cylinder 8, as before stated,

being screw threaded into the flange 4 on p the base 1 communicates with the pump 10 at its base through the channel 12, and is braced in its upright position to the reservoir cylinder 7 by the stay rods 13. At the base of said cylinder 8, and into rally cast in the base 1, I provide a seat 15 for the ball valve 11 at the mouth of the channel 12, to permit the intake of liquid or air from the pump, but to prevent its return therethrough, which is otherwise provided for as hereinafter described.

Within the elevating cylinder 8 is carried the piston rod 14, at t e lower end of which is provided the double headed piston 16 fitting snugly thereon adapted to be raised by thepressure from the pump 10. The opposite end of the piston rod extends beyond the top of the cylinder, and terminates in the curved crane 17 and eyelet 18 upon which is adjustably swiveled the beam 19.

The top of the elevating cylinder is closed with a nut 20 which is provided with an aperture to accommodate the piston rod and form an upper bearing therefor.

Within the reservoir cylinder 7, is provided the pump cylinder 10 of less diameter and height than the reservoir. Said inner cylinder is provided with the pumping pis- .ton rod 21 and piston 22 on the lower end thereof, adapted to force the liquid or air through the channel beneath the base 1 into the elevating cylinder 8. The outer or upper end of the rod 21 extends beyond the top of the cylinder 7. and is coupled with the pumping lever 23 hereinafter described.

Adjacent to the base of the pump cylinder 10, I provide an opening and conical valve 24 and beveled 'seat therefor in the Wall thereof adapted to permit the intake of liquid or air from the reservo' stroke. of the piston and to automatical g close on the downward pressure thereo r on the u Said valve is held against displacement by the ca e 24 secured upon the mner face of the cy inder.

The upperend of the reservoir cylinder is closed by a cap through an aperture in which the piston rod pro ects.

The pumping lever 23, before mentioned is fulcrumed at one end to the pivoted rod 25, and at the opposite end is forked or bifurcated to secure the handle grip 25 between the members thereof. Intermediate of the ends of said lever, a plurality of orifices 25 are provided in which the outer end of the pumping piston rod 21 is pivoted to regulate the leverage, and it will be appreciated that the pivoted fulcrum will permit such adjustment and likewise retain the concentric position of the piston rod by shifting the position of the fulcrum in the upward and downward strokes of the pump.

I will now proceed to describe the means provided for lowering the elevating piston and crane, and the return of the liquid or air into the reservoir 7.

Intermediate of the elevating cylinder 8 and the reservoir 7 I provide a return pipe 26 which has a branch 26 at its lower end communicating with the elevating cylinder 8 beneath the piston 16, and at its top it is provided with a branch 26 leading into the reservoir 7 above the pump cylinder. Intermediate of said branches, I provide a valve 27 in the pipe 26 adapted to control the flow of liquid or air from the elevating cylinder 8 to the reservoir 7. On the end of the valve stem 27 I provide an arm or crank 2-7 which extends upwardly between the braces and between the reservoir and elevatin cylinder where it is in convenient reach 0 the operator.

It will be apparent that when the valve 27 is closed the operation of the pump will force the air or liquid through-the channel beneath the base into the elevating cylinder and "raise the piston and' rod-'therein, and that when it is opened the liquid or air will flow backward through the branches and pipe 26, under the pressure of the weiglit of the lifting pist and rod, and return to the reservoir cylin er. For the purpose of preventing the splash of the liquld contents on such return, I provide a deflector 28 at the top of the orifice through which the branch 26 enters the reservoir.

As shown in the drawings, the pump fulcrum 25 may be swiveled on the upper end of'the return pi e 26.

Having thus escribed my invention, what I claim as new, and desire to be secured by Letters Patent, is-

The combination with a portable base, of a reservoir cylinder removably mounted thereon, of a pump cylinder of less diameter and. height removably mounted on said base Within said reservoir cylinder, a reciprocating piston in said purn cylinder, an inlet valve adjacent to the base of said mp cylinder, an elevating -c linder removably mounted on said base 0 set from said reservoir cylinder having a. piston and crane carried therein, a channel in said base connecting the bases of said pump cylinder and elevating cylinder, an automatic valve. in said base within said elev ting cylinder at the mouth of said channefi, a return pipe leading from the elevating cylinder beneath the piston therein to the reservoir cylinder above the pump cylinder therein, a valve in said return pipe intermediate its ends, and a ump lever pivotally fulcrumed at one end on a rod pivoted on said return pipe and adjustably pivoted intermediate its ends to the piston rod of the pump, substantially as described.

GUY W. SEASHOLE.

Witnesses: i

L. H. BUNCH, R. O. 

